CN1358907A - Horizontal water discharge board vibation pression treatment method for water power blowing filling foundation - Google Patents
Horizontal water discharge board vibation pression treatment method for water power blowing filling foundation Download PDFInfo
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- CN1358907A CN1358907A CN 01134188 CN01134188A CN1358907A CN 1358907 A CN1358907 A CN 1358907A CN 01134188 CN01134188 CN 01134188 CN 01134188 A CN01134188 A CN 01134188A CN 1358907 A CN1358907 A CN 1358907A
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Abstract
The horizontal drainage plate vibration rolling treatment method for hydraulic blow-filling ground base includes the following steps: filling a layer of soil, laying a layer of horizontally-arranged plastic drainage plate, drefilling a layer of soil to make vibration rolling, repeatedly said uperation until the soil-filling is completed. Its key technical lies in that the original vertically-used drainage plate is changed into horizontally-arranged drainage plate to form transverse drainge channel so as to attain the goal of reducing porosity ratio, discharging water smoothly and compacting soil body to raise ground base quality.
Description
Technical field
The present invention relates to the horizontal draining board vibroroller cmpacting facture of a kind of waterpower hydraulic fill foundation or fill foundation.
Background technology
Vibrosinking pile, sand pile and dynamic compaction are used in the processing of hydraulic fill sand at present more, and be on the high side.When the large tracts of land ground was handled, in order to reduce cost, the fine and close method of abroad exploding was in addition handled saturated loose cohesionless soil, and deep layer is vibrated fine and close method (vibrating arm of band oscillating airfoil) reinforcing sand.Vertical drainage plate preloading commonly used in the saturated dredger soft soil, it earlier with board-plugging device in weak soil, vertically be pressed into permeable band drain, then at face of land mound as ballast, the water in soil body extruded drain, thereby the hole of weak soil is reduced, intensity improves, settlement after construction reduces.This is a kind of very good economic and practical again reinforcement of soft soil method, has obtained using widely in industries such as civil construction.But this law need be piled up a lot of cubic metres of earth, and ballast is chronic, takes 6 months to 1 year usually.The common deficiency of above method is: (1) all will just can carry out ground and handle after hydraulic reclamation is finished; (2) to construct with special machinery; (3) need the very long duration.In the various dynamic methods that ground is handled, the quality of draining effect of easing stress directly has influence on consolidation effect.One of purpose that dynamic compaction is laid sand-gravel cushion on the face of land is exactly that the super quiet pore water that quickens in the soil is discharged earthward, improves the strong effect of ramming.This method reinforcing miscellaneous fill is effective especially, and reason is exactly the structure that it has destroyed this class soil, and the super quiet hole of generation presses the drainage channel that forms by the crack to flow out.Produce very high pore water pressure when the fine and close method of exploding begins, can make sand enter suspended state, and increase the possibility that the soil particle cage construction is readjusted.If the excess pore water pressure that causes of blast can very fast dissipation, then the densification effect of dynamic shear stress can be fine.Fine and close to the deep layer vibration, particularly under the situation of saturated sand, if its permeability is little that pore water is discharged rapidly from soil, then effect is not remarkable.For example, during the build on Dutch Oosterschelde dam, once the surface was rammed and compressed into capable overtesting.Layering is poured the sandstone material of particle diameter 0.3-32mm in the water into, every bed thickness 3m.This sand stone layer is mainly as the foundation soil of the dam foundation.With floor space 3.6 * 2.4m
2, impact force 140kN/m
2, vibration frequency 15-25Hz special vibrating plate, carry out top layer vibratory compaction from pontoon and handle.Record circular cone probe Resistance Value q before and after the vibratory compaction
cBe respectively 4MN/m
2And 30MN/m
2But, under vibrating plate, must open circular hole, its area is 25% of the base plate gross area, reduced greatly so that hinder the excess pore water pressure of compacting under the vibrating plate in the soil, otherwise consolidation effect is not good.In the processing to liquefied foundation, have a kind of dissipation method to reinforce, the vertical drainage passage promptly is set in the sand that may liquefy, the excess pore water pressure that produces when quickening earthquake dissipates, thereby reduces or eliminate the possibility of sand earthquake liquefaction.As seen, the discharge of pore water is the NSC that sedimentation takes place, and this theory is not only applicable to the little saturated fine grained soil of permeability, is equally applicable to the saturated sand of moment loading.To studies have shown that of sand liquefaction mechanism, when being subjected to shearing cyclic loading, saturated loosening sand does the time spent, to the contraction of volume take place and be tending towards closely knit, the quick contraction of volume will not cause excess pore water pressure to have little time to dissipate and sharply rise when sand has drainage condition.
Summary of the invention
In order to eliminate 3 disadvantages of prior art, the present invention has conceived a kind of horizontal draining board vibroroller cmpacting facture that ground is handled of just can carrying out in the dredge fill process.This horizontal draining board vibroroller cmpacting processing method will produce a kind of waterpower hydraulic fill foundation of new construction.
The core concept of the technical program is: (1) changes the original vertical band drain that uses in the ground into horizontal positioned; (2) with worker's method of " at vertical setting in the final face of land of pending ground and injection band drain ", change into and in hydraulic reclamation or embankment work progress, place band drain simultaneously, apply vibroroller cmpacting more as required.Operating procedure is: (1) hydraulic reclamation or the one deck that bankets; (2) plastic draining board of laying one deck horizontal positioned; (3) one deck that bankets; (4) vibroroller cmpacting.So repeatedly to the end of banketing.Here said band drain can adopt the plastic draining board in the existing vertical drainage plate preloading, and key is to change horizontal positioned into.In saturated sand, lay horizontal draining board, purpose is the artificial horizontal drainage relief passage that forms permeate well in ground, acceleration increases the discharge rate of pore water between discrete particles because of the excess pore water pressure that part liquefaction produces dissipates, and improves the densification degree.The layout of band drain and spacing will be according to barged-in fill type, vibrating roller sizes, roll number of times, handle the combined factors such as target that the back requires to reach and determine: to coarse sand soil pitch arrangement greatly; To fine sand, silt and weak soil, little pitch arrangement, even every layer of two-way interlaced arrangement improves draining compaction.Its referential data is: the thickness of the layer is 0.5～2 meter between the two-layer band drain, and the lateral separation between the band drain is 1～3 meter, is blossom type or arranged in squares between each layer band drain." vibroroller cmpacting " of the present invention can adopt vibroroller cmpacting machinery and the method in the conventional art.Under the effect of vibroroller cmpacting, make originally the power that has become draining is pressed in the disadvantageous super quiet hole of ground, thereby reduce void ratio, reach the purpose of encrypting the soil body.Here said " so repeatedly to the end of banketing " is meant till the thickness requirement that reaches hydraulic fill foundation, so this " repeatedly " can be once and no longer repeatedly.Number of rolling will be determined according to the reinforcement degree of ground, generally can adopt 1～3 time, if will obtain better closely knit effect, the vibroroller cmpacting pass can be increased to 5 times.But also can not roll, that is to say: number of rolling can be 0.According to rolling with draining is the key of encryption hydraulic reclamation powder fine sand two big effective ways, and horizontal draining board and vibroroller cmpacting are combined.It on the basis of having merged compacting and band drain preloading, drawn the dynamic action of explosion method, dynamic compaction and deep layer vibratory drilling method after, a kind of hydraulic fill foundation facture of proposition.Its reinforcement mechanism is: (1) shortens the path of oozing out of super quiet pore water in the soil with band drain; (2) apply prefabricating load on the one hand with vibrating roller, produce bigger circulation shear stress on the one hand, make the local liquefaction of top layer sand, form super quiet pore water, discharge through the band drain and the face of land, the soil body is by densification.The integrated application of horizontal draining board rolled-on method shear stress, vibrational energy and drainage system, it mainly contains three aspects to the effect of hydraulic reclamation fine sand soil: static(al) compacting, vibratory compaction, draining decompression.In addition, the band drain of horizontal positioned even without prefabricating load, still can play good natural drainage effect, encrypts ground.The present invention can just implement Measures for Making Ground and Foundation in the hydraulic reclamation silt particle, can be base molded in advance significantly and the time of using, and reduce the difficulty of construction.To hydraulic reclamation powder fine sand, behind the general hydraulic reclamation about 10 days, just can bear large-scale vibrating and roll.To saturated dredger soft soil, use light-duty vibrating roller, even can not apply vibroroller cmpacting, and only utilize the pre-compression functions of deadweight of the natural drainage function of horizontal draining board and follow-up embankment and encrypt ground.Method for processing foundation design of the present invention:, calculate soil unit, different depth place and do not produce the required relative density D of liquefaction by average grain diameter, the engineering location maximum ground acceleration of hydraulic fill sand
r, again by D
rPass through the relation of hitting several N with mark and check in the N value, the small tenon when this is and satisfies the anti-liquefaction of ground and require passes through and hits number.Then, in view of the above small tenon passes through whether hit number satisfied with above-mentioned formula checking computations bearing capacity of foundation soil and sedimentation.It is final that different depth place sand should reach when proposing to satisfy bearing capacity, sedimentation and anti-liquefaction and requiring that small tenon passes through hits number.Because horizontal draining board vibrating roller platen press is progressively implemented in the dredge fill process, so, be easy in construction, carry out the feasibility test of this method.To a certain sandy soil, suitably draft several spacing of prefabricated drain, vibroroller cmpacting speed and pass, carry out the test of draining vibroroller cmpacting in arbitrary hydraulic reclamation district, use the definite mark of handling groundwork of standard penetration test (SPT) to pass through then and hit number and relative density.If bearing capacity of foundation soil, sedimentation and the antiseismic liquefying power that can meet design requirement then at first adopt this method; If can not satisfy, then after finishing, dredge fill adopts vibrosinking pile or other Ground Treatment Schemes by test again.
The present invention is from the basic principle of soil mechanics, with the original vertical band drain horizontal positioned of using in the ground; According to the characteristics of waterpower hydraulic fill foundation construction in layer, effectively dredge fill and ground processing are combined; The foundation drainage that institute's hydraulic reclamation goes out is smooth, and easy construction can meet or exceed the foundation quality after the conventional process.Compare with traditional preloading, its characteristic has three: (1) has saved the operation of vertical plate, low price; (2) vibrating roller replaces preloading, has exempted the heap side and the side of abandoning; (3) importantly saved the ground processing time, embankment construction and ground have been handled finished synchronously.With the ground after the method processing of the present invention, standard penetration test shows: the mark of hydraulic reclamation fine sand passes through to hit counts 3～4 times that bring up to when not handling.Standard injection, static sounding and load plate test show that all the ground of reinforcing can reach bearing capacity, sedimentation and the target that do not liquefy of making the ground engine request.The present invention mainly is applicable to the large tracts of land that does not have big point load, the hydraulic fill foundation of middle small load, as the stockyard of civil engineerings such as harbour, power plant, road, ash disposal area etc.The hydraulic reclamation material is required to be silt and fine sand, requires hydraulic reclamation can bear vibrating roller deadweight and vibration force after a couple of days.Though this method proposes and application success at the powder fine sand of hydraulic reclamation, its basic principle is equally applicable to saturated dredger soft soil and the bigger embankment of water content, directly adopts or change a little just to may extend in these engineerings.There is the coastline of numerous basins such as the Changjiang river, the Yellow River, the Zhujiang River and thousands of kilometers in China, a large amount of river shoal hydraulic reclamations is arranged and the engineering of reclaiming fields from the sea every year.With the minimizing that area can be ploughed in the landing field, the hydraulic reclamation engineering will be more and more many also.Because quick, the low price and simple of horizontal draining board vibrating roller platen press have broad application prospects in waterpower hydraulic reclamation engineering foundation is reinforced, and can save a large amount of construction investments and building time.
Description of drawings
Fig. 1 is embodiment 1 structural representation;
Fig. 2 is the thing sectional drawing of Fig. 1;
Fig. 3 is the north and south sectional drawing of Fig. 1.
The specific embodiment
Embodiment 1, certain 450,000 kilowatts of power plant needs hydraulic reclamation to form 90 hectares of places, and to wherein 24 hectares carry out ground and handle, require to reach 50kPa bearing capacity of foundation soil, settlement after construction under the 50kPa load action less than 50mm and under seismic condition sand do not liquefy.Adopt horizontal draining board vibrating roller platen press in the dredge fill process, form the waterpower hydraulic fill foundation, with reference to Fig. 1～Fig. 3: the soil layer of filling out at first is 1, and the plastic draining board 2 of one deck horizontal positioned is laid in the back, between each band drain apart from 1.5m.Fill out again and carry out vibroroller cmpacting behind the soil layer 3 and handle, so repeat hydraulic reclamation, lay band drain, again hydraulic reclamation, roll until end.Among Fig. 1,3 is the soil layer that is rolling; 4 is multistage sub-weir, and 5 is original ground.Stake long 8～15m, length overall 14.6m, the vibro-replacement stone column method of cost up to 3,780,000 dollars are adopted in suggestion in the former letter of invitation to tender of this example; Adopt after the horizontal drainage vibrating roller platen press of the present invention, only 500,000 dollars of costs are compared with former scheme and to have been saved more than 320 ten thousand dollars of ground handlings.Importantly finish hydraulic reclamation and ground treatment construction on schedule and do, avoided seller's seven sale 30,000 dollars huge fine every day, economic benefit is very huge.
Claims (3)
1, a kind of horizontal draining board vibroroller cmpacting facture of waterpower hydraulic fill foundation the steps include:
One deck bankets
Lay the plastic draining board of one deck horizontal positioned
One deck bankets
Vibroroller cmpacting
So repeatedly to the end of banketing.
2, according to the horizontal draining board vibroroller cmpacting facture of the described waterpower hydraulic fill foundation of claim 1, it is characterized in that: the thickness of the layer is 0.5～2.0 meter between the two-layer band drain, lateral separation between the co-layer draining plate is 1～3 meter, is blossom type or arranged in squares between each layer band drain.
3, according to the horizontal draining board vibroroller cmpacting facture of claim 1 or 2 described waterpower hydraulic fill foundations, number of rolling is 0 time to 5 times.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134188 CN1358907A (en) | 2001-11-22 | 2001-11-22 | Horizontal water discharge board vibation pression treatment method for water power blowing filling foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134188 CN1358907A (en) | 2001-11-22 | 2001-11-22 | Horizontal water discharge board vibation pression treatment method for water power blowing filling foundation |
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| CN1358907A true CN1358907A (en) | 2002-07-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235635B (en) * | 2008-02-05 | 2010-09-08 | 北京光彩恒溢科技有限公司 | Blowing filling sludge ground-making construction technique and device thereof |
| CN101929160B (en) * | 2009-06-24 | 2012-05-23 | 鞍钢集团矿业公司 | Method for building impermeable tailings dams with high scattered piles by waste rocks |
| CN110029654A (en) * | 2019-04-12 | 2019-07-19 | 杭州知桔科技有限公司 | Bilateral symmetry adjustable plastic drain bar board plug device |
| CN112030936A (en) * | 2020-09-04 | 2020-12-04 | 中交天航滨海环保浚航工程有限公司 | Construction method for treating soft soil foundation of hydraulic reclamation project |
| CN114411684A (en) * | 2022-01-06 | 2022-04-29 | 西北工业大学 | Dynamic compaction reinforcement optimization technology for high-fill filling and construction method thereof |
-
2001
- 2001-11-22 CN CN 01134188 patent/CN1358907A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235635B (en) * | 2008-02-05 | 2010-09-08 | 北京光彩恒溢科技有限公司 | Blowing filling sludge ground-making construction technique and device thereof |
| CN101929160B (en) * | 2009-06-24 | 2012-05-23 | 鞍钢集团矿业公司 | Method for building impermeable tailings dams with high scattered piles by waste rocks |
| CN110029654A (en) * | 2019-04-12 | 2019-07-19 | 杭州知桔科技有限公司 | Bilateral symmetry adjustable plastic drain bar board plug device |
| CN112030936A (en) * | 2020-09-04 | 2020-12-04 | 中交天航滨海环保浚航工程有限公司 | Construction method for treating soft soil foundation of hydraulic reclamation project |
| CN114411684A (en) * | 2022-01-06 | 2022-04-29 | 西北工业大学 | Dynamic compaction reinforcement optimization technology for high-fill filling and construction method thereof |
| CN114411684B (en) * | 2022-01-06 | 2024-02-06 | 西北工业大学 | Dynamic compaction reinforcement construction method for high-fill filling |
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